Bit rearrangement for MIMO retransmissions

Ho Moon Sung, Ho Park Hyung, Andrea Goldsmith, Oh Minseok

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


In this paper, we propose a new hybrid automatic repeat request (H-ARQ) scheme in MIMO. The proposed scheme performs bit-level exchanges and modifications every retransmission and covers all combinations of number of antennas and number of retransmissions in M-QAM. In order to obtain a better bitwise mapping scheme, we define two independent bitwise suboperations, which are called bit swapping and inversion (BSI) and bit shifting between antennas (BSA), and derive sets for BSI and BSA. The performance of the proposed scheme is evaluated through link simulations with a 3GPP long-term evolution (LTE) specification and is compared to previous H-ARQ schemes in MIMO. The results show that the proposed bitwise mapping scheme provides approximately 2 dB gain over the conventional scheme even at a high mobile speed.

Original languageEnglish (US)
Title of host publicationIEEE GLOBECOM 2007 - 2007 IEEE Global Telecommunications Conference, Proceedings
Number of pages5
StatePublished - 2007
Externally publishedYes
Event50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007 - Washington, DC, United States
Duration: Nov 26 2007Nov 30 2007

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference


Other50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007
Country/TerritoryUnited States
CityWashington, DC

All Science Journal Classification (ASJC) codes

  • General Engineering


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